大庆石油地质与开发2026，Vol.45Issue(5)：31-41,11.DOI:10.19597/J.ISSN.1000-3754.202509068
辽河西部凹陷曙光古潜山断裂特征及控油气作用
Fault characteristics and control on oil and gas in Shuguang buried hill of western sag in Liaohe Depression
摘要
Abstract
Shuguang buried hill area serves as a crucial area for hydrocarbon production increase in western sag of Liaohe Depression.Multi-stage complex faults control its structural framework and hydrocarbon distribution,hinder-ing deep exploration of buried hill reservoirs.Aiming at the problems of unclear understanding of fault staging and transport-sealing capacity,and weakening fault controlling mechanisms on the whole process of hydrocarbon"migra-tion-accumulation-preservation"in Shuguang buried hill belt,structural evolution history,fault sealing capacity and the relationship between faults and hydrocarbon distribution are comprehensively analyzed based on seismic inter-pretation,drilling,well testing,and formation testing data.The characteristics and evolutionary processes of faults in Paleozoic and Proterozoic Shuguang buried hills are systematically studied,as well as fault control on hydrocarbon reservoirs accumulation and distribution.The results indicate that,faults in Paleozoic and Proterozoic Shuguang area primarily exhibit NE-strike distribution,with secondary faults oriented nearly E-W and nearly S-N strike.The faults are divided into 3 stages,including reverse faults from the A-episode of Yanshanian Movement,normal faults from B-episode of Yanshanian Movement,and normal faults from Himalayan Movement.Himalayan faults have larger throws and dip angles,strongly facilitating hydrocarbon transportation.Secondary faults of Yanshanian period have smaller fault throws and relatively gentler dip angles,predominantly dipping westward and southward,and acting as sealing faults,which is conducive to hydrocarbon sealing.Fault sealing in different areas varies significantly.When Shale Gouge Ratio ISGR≥23%,fault lateral sealing is better,which is more favorable for hydrocarbon accumulation.The research provides a theoretical basis for oil and gas exploration in this area,with significant guidance for favor-able areas optimization.关键词
曙光地区/古潜山/断裂特征/断层输导/控油气作用Key words
Shuguang area/buried hill/fault characteristics/fault transport/control on oil and gas分类
能源科技引用本文复制引用
火勋港,陈君青,陈昌,庞宏,姜福杰,田志..辽河西部凹陷曙光古潜山断裂特征及控油气作用[J].大庆石油地质与开发,2026,45(5):31-41,11.基金项目
新型油气勘探开发国家科技重大专项"渤海湾超级盆地油气富集规律与新领域勘探技术"(2024ZD1400100). （2024ZD1400100）
